Carbide insert bit drilling at the Cleveland-Cliffs Iron Co. mines Ishpeming, Mich.
By: by Walter E. Lewis.
Contributors: United States. Bureau of Mines.
Series: Information circular (United States. Bureau of Mines) -- 7558
Publisher: U.S. Dept. of the Interior, Bureau of Mines
Published: 1950
Place of publication: Washington, DC
Language: eng
Number of pages: 16
Notes: Bibliogr.

1